Multicomponent self-assembly of Mn(I)-based thiolato-bridged ester functionalized rectangular and V-shaped tetranuclear metallacyclophanes

Kumar, Chowan Ashok; Govindarajan, Ramadoss; Kumar, Udit; Karthikeyan, M.; Varghese, Babu; Manimaran, Bala.

doi:10.1016/j.ica.2018.01.017

Cited by 11 publications

(2 citation statements)

References 67 publications

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“…The IR spectra of metallacycles 1–4 showed four strong bands in the range ν 2022–1914 cm –1 corresponding to the terminal carbonyl ligands of fac -Mn(CO) 3 -core. , The terminal carbonyl ligand-stretching frequencies obtained for these selenolato-bridged metallacycles were found to be lesser in comparison to that of the thiolato-bridged Mn(I) metallacycles. , The ester CO stretching frequency of the pdi, hdp, pcadgd, and pcatgd ligands was seen as a medium band in the range ν 1759–1731 cm –1 with respect to its corresponding connecting spacer group. The 1 H NMR spectra of metallacycles 1–4 displayed appropriate signals for the phenyl group of the selenolato-bridge and the ester-functionalized flexible ligands.…”

Section: Resultsmentioning

confidence: 90%

Selenolato-Bridged Manganese(I)-Based Dinuclear Metallacycles as Potential Anticancer Agents and Photo-CORMs

et al. 2019

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Selenolato-bridged manganese(I)-based dinuclear metallacycles [{(CO)3Mn(μ-SeC6H5)2Mn(CO)3}(μ-L)] (1–4) were achieved in a single-step process by the self-assembly of dimanganese decacarbonyl, diphenyl diselenide, and flexible ditopic ester-functionalized pyridyl ligands [1, L = o-phenylene diisonicotinate (pdi); 2, L = 1,6-hexanediyl di-4-pyridine carboxylate (hdp); 3, L = 4-pyridine carboxylic acid diethylene glycol diester (pcadgd); 4, L = 4-pyridine carboxylic acid triethylene glycol diester (pcatgd)]. Synthesis of a series of selenolato-bridged dinuclear Mn(I)-based metallacycles was facilitated via oxidative addition of C6H5Se–SeC6H5 to (CO)5Mn–Mn(CO)5 with simultaneous coordination of flexible ditopic pyridyl linkers in an orthogonal fashion. The metallacycles were characterized by IR, UV–vis, NMR, and electrospray ionization-mass spectroscopic techniques and elemental analysis. Solid-state structural elucidation of 3 was carried out using single-crystal X-ray diffraction methods. In addition, anticancer activity studies were carried out for compounds 2–4 with various cancer cell lines. Furthermore, compound 3 was probed to evaluate its potential CO-releasing property using myoglobin assay.

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Section: Resultsmentioning

confidence: 90%

Selenolato-Bridged Manganese(I)-Based Dinuclear Metallacycles as Potential Anticancer Agents and Photo-CORMs

et al. 2019

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“…In earlier reports from our group, several types of di-, tetra-, and hexanuclear metallacyclophanes of fac -M(CO) 3 -core (M = Mn/Re) with many kinds of bridging and chelating ligands have been explored using a library of mono-, bi-, and tridentate pyridyl linkers. 81–86 In order to extend the chemistry of tetradentate ligands with a facial tricarbonyl rhenium core, we intended to exploit the coordination of the pentaerythritol tetra pyridine carboxylate ligand for developing the scope of tetra ester functionalities in host–guest and molecular recognition studies. Spiro-metallacyclophanes are of particular interest owing to their additional structural features and potential for developing supramolecular photoswitches, trapping of halide ions, and exhibiting luminescent properties.…”

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confidence: 99%